US President-elect Donald Trump acknowledged for the first time Wednesday that he believes Russian operatives hacked the Democratic Party during the election, but he continued to dispute intelligence reports that Moscow acted to help him win.

US President-elect Donald Trump acknowledged for the first time Wednesday that he believes Russian operatives hacked the Democratic Party during the election, but he continued to dispute intelligence reports that Moscow acted to help him win.

"I think it was Russia," Mr Trump conceded at the press conference in New York when asked who was responsible for the leaks of Democratic emails during the campaign.

But Mr Trump said he believes Russia would have released damaging information about him had they obtained such information.

Mr Trump also addressed questions about his relationship with Russian President Vladi­mir Putin, saying "If Putin likes Donald Trump, guess what folks, that's an asset not a liability. I don't know if I'll get along with Vladi­mir Putin. . .but even if I don't does anyone in this room think Hillary Clinton will be tougher on Putin than me? Give me a break."

Mr Trump made his remarks in his first news conference as President-elect, ending a period of 167 days since he has fielded questions from the full media contingent. Past winners of the presidency have traditionally faced the press far earlier.

The president-elect also charged via Twitter that his "crooked opponents" are trying to undermine his electoral victory. He accused the intelligence community of leaking the information to get in "one last shot at me," saying, "Are we living in Nazi Germany?"

"I think it was disgraceful, disgraceful that the intelligence agencies allowed any information that turned out to be so false and fake out there," Mr Trump told the news conference. He called the dossier that makes salacious claims about him "fake news" and "phony stuff."

"I think it's a disgrace ... That's something that Nazi Germany would have done," the Republican said days ahead of his inauguration.

Mr Trump's comments follow the revelation Tuesday night that a classified report delivered to Mr Trump and President Obama last week, according to US officials, included a section summarising allegations that Russian intelligence services have compromising information about Mr Trump's personal life and finances.

The officials said that US intelligence agencies have not corroborated those allegations but believed the sources involved in the reporting were credible enough to warrant inclusion of their claims in the highly classified report on Russian interference in the presidential campaign.

Earlier Wednesday, a spokesman for Russian President Vladimir Putin called the allegations that Russia has collected compromising information about Trump an "absolute fantasy."

Soon after, Mr Trump tweeted: "Russia just said the unverified report paid for by political opponents is 'A COMPLETE AND TOTAL FABRICATION, UTTER NONSENSE.' Very unfair!"

Most media organisations reported only on the existence of the report and that intelligence officials had included a summary of it in their briefings with Mr Trump and Mr Obama on Russia's attempts to sway the election. But BuzzFeed News published a document supposedly created by a former British intelligence official. The information it contains has not been verified.

Mr Trump and other officials appeared to focus on BuzzFeed's publication of the report, denying that the document possesses any truth.

Mr Trump said Wednesday morning that he had no relationship with Russia that could compromise him.

"Russia has never tried to use leverage over me," he said. "I HAVE NOTHING TO DO WITH RUSSIA — NO DEALS, NO LOANS, NO NOTHING!"